package gulimall.config;

import org.springframework.cloud.client.ServiceInstance;
import org.springframework.cloud.client.loadbalancer.reactive.ReactiveLoadBalancer;
import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClient;
import org.springframework.cloud.loadbalancer.annotation.LoadBalancerClients;
import org.springframework.cloud.loadbalancer.core.RandomLoadBalancer;
import org.springframework.cloud.loadbalancer.core.ServiceInstanceListSupplier;
import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.core.env.Environment;

/**
 * 负载均衡配置
 *
 * @author HLF
 * @date 2022/8/1 16:26
 */
@LoadBalancerClients(value = {
        @LoadBalancerClient(value = "gulimall-member"),
        @LoadBalancerClient(value = "gulimall-third-party")
}, defaultConfiguration = LoadBalancerConfig.class)
public class LoadBalancerConfig {

    /**
     * 随机负载均衡策略
     */
    @Bean
    public ReactiveLoadBalancer<ServiceInstance> randomLoadBalancer(
            Environment environment, LoadBalancerClientFactory loadBalancerClientFactory) {
        String name = environment.getProperty(LoadBalancerClientFactory.PROPERTY_NAME);

        return new RandomLoadBalancer(loadBalancerClientFactory
                .getLazyProvider(name, ServiceInstanceListSupplier.class), name);
    }
}
